note wazoox Big Heat : CO2 in the atmosphere will bring us a back a new carboniferous era. <br /> Big Freeze : rise of global temperature will change ocean streams regulation and will make the Gulf Stream disappear, which in turn will freeze Europe and north America <em>or</em> Universe will expand indefinetely and mid energy level will fall forever until every star burns out and everything freezes to death for ever <br /> Big Crunch : Universe will cease to expand and will contract again, to the Big Crunch and a new Big Bang to come.<br /> Big rip I don't know of. 549381 549382